President Donald Trump and DemocratJoe Biden spent Tuesday trading insults - sometimes in real-time - as they stumped across Iowa in split screen moments that could preview a ferocious fight ahead if the two men face off for the presidency next year.

At nearly the same moment in Mount Pleasant, meanwhile, Biden noted that his staff told him Trump was watching footage of his criticism of the president from early in the day as Air Force One landed in Iowa. Those polls don't exist. Although we're still a while away from that, MacCallum said during a Wednesday appearance on "America's Newsroom" that Trump's campaign should certainly take note of those numbers.

Biden added that Trump "backed off his threat of tariffs to Mexico basically because he realized he was likely to lose" in manufacturing states such as MI and Ohio.

Most recently, Biden's sudden about-faces on the Hyde Amendment, which blocks the use of federal funds for abortions, and the US' relationship with China have confused voters who aren't sure what (if anything) he stands for, spawning a new nickname from President Donald Trump: "Floppy Joe". "I just was given a meeting with my pollster who I frankly don't even believe in pollsters if you want to know the truth, you just run a campaign and whatever it is, it is, but I just had a meeting with somebody that's a pollster and I'm winning everywhere, so I don't know what you're talking about".

On Tuesday, the New York Times reported that the president, when shown the data, instructed his aides to publicly say he is polling well.

Biden is atop the massive Democratic presidential field only because of his frequent attacks on Trump, the president said. "You should have, but it was late in the evening and perhaps you didn't get a chance". He started to say more but then stopped himself, quipping, "My mother would say, Joey, focus".